Abstract

In Illinois after the diagnosis of scarlet fever and other hemolytic streptococcal infections of the upper respiratory tract is made, "Isolation is required for a minimum period of 14 days after onset and thereafter until the nose, throat, glands, and ears are normal on inspection or until the physician reports complete clinical recovery."1

Other states have essentially the same regulation except that the minimum quarantine period is 21 days instead of 14. It is natural to assume that termination of quarantine marks the time at which the patient is no longer infectious and the time at which he has made